Furness controls FCO770, Руководство пользователя

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FCO770 Users Guide Issue 1 Page 63
RIGHT
This is used to move the cursor right when setting data.
ESC
Used to return back or escape from a menu entry.
The utility menu options and usage is detailed below:
SET ZERO PRESS.
•
It is possible for the zero point of the test pressure transducer to drift over time or with
large temperature changes. This allows any drift that may occur to be corrected.
•
Options:
o
NO: Exit with no change.
o
YES : Correct the zero offset.
Before selecting YES, TURN OFF THE AIR SUPPLY TO THE FCO770.
The instrument should have been switched on for at least 15 minutes.
CALIBRATE PRESS.
•
Normal calibration is carried out at the factory and the information is stored securely
in the instrument. This information cannot be altered. However this menu allows up to
±10% adjustment for field recalibration. Since the original calibration is not changed
it can be reset as required.
o
Initially the pressure reading is displayed flashing. Use the
UP
and
DOWN
buttons to change the reading to match your calibration device, and then press
ENTER
to continue.
o
The resulting percentage change from original calibration is then displayed
and may be edited. Set to zero to use the original factory calibration.
o
Press
ENTER
again to finish.
CALIBRATE D.P.
•
Normal calibration is carried out at the factory and the information is stored securely
in the instrument. This information cannot be altered. However this menu allows up to
±10% adjustment for field recalibration. Since the original calibration is not changed
it can be reset as required.
o
Initially the differential pressure reading is displayed flashing. Use the
UP
and
DOWN
buttons to change the reading to match your calibration device, and then
press
ENTER
to continue.
o
The resulting percentage change from original calibration is then displayed
and may be edited. Set to zero to use the original factory calibration.
o
Press
ENTER
again to finish.
CALIBRATION DUE
•
Set the date that the next calibration check is due. This should be set each time the
instrument is calibrated so that the MEWS system can give advance warning of when
the next calibration is due.
CALCULATE VOLUME
•
This sub menu allows the FCO770 to calculate volume automatically, based on a
known leak. A leak test on a known good item must be run with the approximate test
volume and the calibrated leak attached. The result of this test should be recorded for
reference purposes. The Calibrate Flow Procedure section of this guide gives full
details of the use of this menu.
•
“TEST”: When you enter the menu you must first select the test to use from a list. The